Some standard content:
Mechanical Industry Standard of the People's Republic of China
Marine AC Windlass Automatic Mooring Winch Control Box This standard refers to the relevant provisions of the international standard IEC92 publication "Marine Electrical Equipment". 1 Subject content and scope of application
JB/T5792-1991
This standard specifies the working conditions, technical requirements, test methods, inspection rules and packaging and transportation of marine AC windlass control boxes and automatic mooring winch control boxes (hereinafter referred to as control boxes). This standard is applicable to AC 50Hz380V; 60Hz440V control boxes. After the product is matched with the marine master controller, it controls the starting, braking, forward rotation, reverse rotation, speed change and protection of AC variable-pole variable-speed asynchronous motors in equipment such as windlasses or windlass winches, cable winches, anchor and mooring combination machines, mooring winches and automatic mooring winches. 2 Reference standards
GB2423.16
GB2423.17
GB2900
GB3783
GB3893
GB7061
GB7094
GB7251
JB3084
JB4159
ZBU04001
3 Terminology
Basic environmental test regulations for electric and electronic products Test A: Low temperature test method
Basic environmental test regulations for electric and electronic products Basic environmental test regulations for electric and electronic products Basic environmental test regulations for electric and electronic products Basic environmental test regulations for electric and electronic products Electrical terminology
Basic standards for marine low-voltage electrical appliances
Glossary of terms for ship deck machinery
Protection level of low-voltage electrical enclosures
Test B: Commercial temperature test method
Test Db: Alternating damp heat test method
Test J: Mildew test method
Test Ka: Salt spray test method
General technical conditions for marine low-voltage switchgear and control equipment Vibration test method for marine electrical equipment
Product packaging and transportation regulations for low-voltage complete switchgear
Product packaging and transportation regulations for power transmission control stations General technical requirements for tropical electrical products
Model compilation method for marine low-voltage switchgear and electric control equipment In addition to the terms specified in this standard, other terms can be found in GB2900 and GB3893. 3.1 Single-speed
The speed of the stator winding with the largest number of pole pairs of the variable-pole variable-speed asynchronous motor when it is energized. 3.2 Two-speed
The speed of the variable-pole variable-speed asynchronous motor is only higher than the first speed. 3.3 Three-speed
The speed of the pole-changing variable-speed asynchronous motor is only higher than the second speed. Approved by the Ministry of Machinery and Electronics Industry on October 15, 1991, 108
Implemented on October 1, 1992
3.4 Four-speed
JB/T5792-1991
The speed of the pole-changing variable-speed asynchronous motor is higher than the third speed. 3.5 Actual tension value
The tension of the cable of the automatic mooring winch in actual operation. 3.6 Predetermined tension value
Artificially selected tension value.
4 Models and classifications
Models and their meanings
AC anchor winch control box models and their meaningsx
AC automatic mooring winch control box models and their meanings: 4.1.2
Speed classification of controlled motor
Rated working current of main contactor
Design serial number
Anchor winch electronic control equipment
Box-type structure
Speed classification of controlled motor
Rated working current of main contactor
Design serial number
Mooring winch
Box-type structure
Unless otherwise specified, the control box is divided into 20, 25, 40, 63, 100, 160, 250A according to the rated working current of the main contactor. 4.2
4.3 According to the maximum speed of the controlled variable-speed asynchronous motor, it is divided into 2-2 speed, 3-3 speed, and 4-4 speed. 4.4 The dimensions of the control box are shown in Figure 1 and Table 1. 109
Normal working conditions
JB/T5792—1991
Figure 1 Dimensions of control box
400, 520, 600, 660, 700, 800, 900, 1000220, 260, 280, 300, 340, 400, 460700, 800, 1000, 1200, 1400, 1600, 1800, 2000The control box should be able to work normally under the following environmental conditions: a.
The ambient air temperature is not higher than 45℃. Not less than -25℃; Should be able to withstand humid air at sea;
Should be able to adapt to environments with salt mist, oil mist and mold; Tilt: ±22.5°;
Swing: ±22.5°;
Should be able to withstand vibration and impact generated during normal operation of the ship: mm
Should be able to withstand voltage changes of 6% to 10% of the rated voltage and frequency changes of ±5% of the rated frequency. Technical requirements
Circuit function design
The main circuit and the control circuit are powered by the same feeder, and the main circuit should be equipped with a power switch. The circuit function of the AC windlass control box
should have the following protections:
main circuit overload protection;
loss of pressure and single-phase operation protection;
emergency brake parking device;
forward and reverse interlock of the windlass motor;
control circuit short-circuit protection
JB/T5792—1991
6.1.2.2 The main circuit should be able to meet the overload capacity of the motor under the condition of 1.6 times the rated load, and work continuously for 2 minutes. 6.1.2.3 For three-speed motors. The speed change is from one speed to two speeds to three speeds. When the load is less than 50% of the rated load. It is allowed to enter the three-speed state. When the three-speed is overloaded, it should automatically return to the two-speed state, and when the two-speed is overloaded, all work will stop. 6.1.2.4 For the selection of the rated current of the thermal relay and the current of the thermal element in the main circuit, refer to Appendix A. The set current of the thermal element is adjusted according to the working mode of the controlled motor.
6.1.3 Circuit functions of the control box of the AC automatic mooring winch 6.1.3.1 The following protections should be provided;
Short circuit and overload protection;
Protection against loss of pressure and single-phase operation;
Overload protection for cable tension;
Automatic working condition signal indication and fault alarm device: emergency stop device;
Winch motor winding overheat protection;
Winch motor cooling fan protection,
Winch motor forward and reverse interlocking;
Interlocking of fan and control circuit.
There should be manual control.
6.1.3.3When mechanical tension detection is selected for the automatic working mode of the mooring winch, the speed of the motor should be determined according to the actual cable tension and the preset tension value. Unless otherwise specified, it can be selected by referring to Appendix B. 6.1.3.4 When the electric tension detection is selected for the automatic working condition of the mooring winch, the working state of the motor has the following three conditions: when the actual tension value is balanced with the preset tension value, the automatic control system does not work; a.
When the actual tension value is less than the preset tension value, the motor reels the cable at one speed; b.
c. When the actual tension value is greater than the preset tension value, the motor releases the cable at one speed. 6.2 Structural design
6.2.1 The control box is a steel plate bending structure. It should have sufficient mechanical strength after welding. It is guaranteed not to be deformed during installation, manufacturing and transportation. 6.2.2 The panel of the control box should be flat and symmetrical. The inner and outer surfaces should be sprayed with a firm covering layer, the color should be uniform, and there should be no defects such as blistering, cracks or flow marks.
6.2.3 The door of the control box should be able to be opened and closed flexibly at an angle of not less than 90°. And its opening and closing position can be fixed. 6.2.4 The shell of the control box should be equipped with a copper grounding screw of no less than M6 and have an obvious grounding mark. The contact between the shell and the screw is required to be reliable, and the contact resistance value should be less than 0.1. 6.2.5 All steel fasteners in the control box should have sufficient mechanical strength and corrosion resistance. All connectors and fasteners should have anti-loosening devices. 6.2.6 The enclosure protection level of the control box should not be lower than IP22, and the protection level should not be reduced after the external cable enters. 6.2.7 If the control box door is equipped with electrical components, there should be a reliable grounding device on the door. 6.3 Selection and installation of electrical components
6.3.1 The performance of all electrical components should comply with the requirements of GB3783 or their own technical standards. 6.3.2 All electrical components should be installed and adjusted according to the specified installation conditions, and should be easy to inspect, repair and replace, and should not produce harmful noise and perturbations.
6.3.3 All electrical components should be firmly fixed, and each component should be marked with a clear and durable symbol or code consistent with the electrical schematic diagram. The rated current of the fuse should be marked with a resistance mark. 6.3.4 All electrical components should be installed so that their normal functions will not be damaged or malfunction due to interaction (such as heating, arcing, vibration, electromagnetic field, etc.).
6.4 Wire number setting
6.4.1 The main circuit wires should use different cross-sections according to the rated current of the main contactor or the controlled motor. JB/T5792--1991
The connecting wires of the control circuit should use multi-strand plastic soft wires with a rated insulation voltage of not less than 500V, and the wire cutting area should not be less than 6.4.23
1mm. The grounding wire should be distinguished by yellow and green colors. 6.4.3 The insulation layer of all circuit connecting wires and the supporting parts for wiring should be made of flame-retardant materials. 6.4.4 The insulated wires connecting the electrical components in the control box should be wired in a line trough. Otherwise, the appropriate number of wires should be tied and fixed at a certain distance.
6.4.5 The ends of the connecting wires between the electrical components should be pressed with copper joints. The connecting wires between two wire points shall not have intermediate connectors, and all terminals must be firmly connected.
6.4.6 All wires connected to external devices in the control box shall be concentrated on the wiring terminals. For the lead wires with larger current, it is allowed to be led from the connector of the component itself. And there shall be a fixing frame. 6.4.7 The arrangement and marking of the three-phase sequence of the main circuit shall comply with the provisions of GB7061. 6.4.8 Each terminal on the terminal board can only connect one wire. When two or more wires need to be connected, there shall be a wiring point designed for this purpose.
The wire connected to the heating resistor shall be stripped of an insulation layer of not less than 40mm long and covered with heat-resistant insulating material. 6.4.10 The ends and terminals of all connecting wires shall be marked with the symbols or numbers of each circuit according to the electrical principle diagram, and the markings shall be clear and durable.
6.5 Temperature rise
The temperature rise of each part of the control box shall not exceed the provisions of Table 2 (ambient temperature is 45℃). Table 2
Internal electrical components
Contact point of main circuit wire (tinning)
Metallic
Insulated
Operating handle:
Metallic
Insulated
Wiring of external insulated wire
Insulated wire
6.6 Electrical insulation performance
6.6.1 Electrical clearance and creepage distance
According to the standard applicable to the appliance
According to its own allowable value
The electrical clearance and creepage distance between each exposed conductor or part of the control box, and between them and the casing shall not be less than the provisions of Table 3 (except for electronic components and electrical components themselves). Table 3
Rated insulation voltage
300≤660
6.6.2 Dielectric strength
Electrical distance
≤63A
Creep distance
≤63A
JB/T5792—1991
The insulation of the control box should be able to withstand the following specified power test voltage value (effective value), and there should be no breakdown or flashover during the specified time. The main circuit and the auxiliary circuit and control circuit directly connected to the main circuit. The power frequency test voltage value is specified in Table 4. 6.6.2.1
Rated insulation voltage
300660
Test voltage
The power test voltage value of the auxiliary circuit and control circuit not directly connected to the main circuit shall be specified in Table 5. Table 5
Rated insulation voltage
6.6.3 Insulation resistance
Test voltage
2u+1000 but not less than 1500
6.6.3.1 Under normal working conditions, the cold insulation resistance between the live parts of the main circuit and between the live parts of each circuit and the ground of the control box shall not be less than 10Mn.
6.6.3.2 After the withstand voltage test, the insulation resistance between the live parts of the main circuit and between the live parts of each circuit and the ground of the control box shall not be less than 1Mn.
Performance to withstand climate environment
After the control box has been subjected to 55℃ 2-cycle alternating damp heat test, its performance shall meet the following requirements: Insulation resistance shall not be less than 1MO:
The action performance shall meet the requirements of Article 7.2;
The dielectric performance shall meet 85% of the values listed in Table 4 and Table 5; The appearance quality and adhesion of the surface paint shall not be lower than the third-level requirements specified in JB4159. After the 28d long-term test of the insulating parts in the control box, the long-term area generally does not exceed the second-level requirements specified in GB2423.16. After the 48h salt spray test, the appearance changes of the metal parts exposed to the air of the control box shall meet the requirements of Table 6. Table 6
Coating category
Copper + nickel + chromium
Low tin bronze + chromium
Inlaid or commercial tin bronze steel
Silver or gold
Performance to withstand mechanical force
Base metal
Copper and copper alloy
Copper and copper alloy
Copper and copper alloy
Qualification requirements
No brown rust on the main surface
No white or gray-black corrosion on the main surfaceNo light green corrosion on the main surface
No gray or light green corrosion on the main surfaceNo gray-black detachment on the main surface
No verdigris on the main surface
6.8.1 When the control box is tilted forward, backward, left or right along the horizontal axis at the angle specified in Article 5.4, it should not be damaged or malfunction. The control box shall be subjected to vibration test according to the data specified in Table 7, and shall not have mechanical damage or malfunction. 6.8.3
Installation location
General cabin
Rate range
13.2~80.0
6.9 Additional requirements for control box with electronic components Hz
Displacement ±imm
Acceleration ±7m/s
6.9.1 Electronic components shall work normally in the ambient air temperature range of 0~+55℃, and during operation, when the highest ambient air temperature is +70℃, it can still work reliably for 2h. 6.9.2 The AC power supply voltage and frequency changes of electronic components shall comply with the provisions of Article 6.15.2 of GB7061. 6.9.3 Unless otherwise specified, the anti-electromagnetic interference of electronic components shall comply with the provisions of Article 6.15.4 of GB7061. 7 Test method
7.1 General inspection
7.1.1 According to the relevant provisions of the product technical standards and manufacturing drawings, visually inspect the structure, electrical installation, wire connection, wiring process, insulation performance, fasteners, surface coating, appearance and installation dimensions of the control box. 7.1.2 Check whether the grounding of each electrical component is good. The resistance between the grounding screw and the metal shell should meet the provisions of Article 6.2.4. 7.2 Power-on operation inspection
After checking that the internal wiring of the control box is correct according to the electrical schematic diagram. Carry out power-on operation test, pass 90% and 106% of the rated voltage to the control circuit respectively, and operate each for 5 times, and it should be able to work normally. 7.3 Dielectric strength test
7.3.1 Test the dielectric strength of Article 6.6.2 in accordance with the provisions of Article 7.3 of GB7061. 7.3.2 The withstand voltage test of the factory test lasts for 1s. The withstand voltage test of the type test lasts for 1min. 7.4 Determination of insulation resistance
Test the insulation resistance specified in Article 6.6.3. Perform in accordance with Article 7.4 of GB7061. 7.5 Temperature rise test
Test the temperature rise value specified in Article 6.5 in accordance with Article 7.5 of GB7061. 7.6 Protection level test
Test the enclosure protection level specified in Article 6.2.6 in accordance with the provisions of GB4942.2. 7.7 Damp heat test
Test the moisture resistance of Article 6.7.1 in accordance with GB2423.4. 7.8 Mildew growth test
Test the test of resistance to fungi in Article 6.7.2, which shall be carried out in accordance with the provisions of GB2423.16. If the insulating materials and coatings used have corresponding long-micro test reports, the test can be exempted during the validity period. 7.9 Salt spray test
Test the salt spray resistance test in Article 6.7.3, which shall be carried out in accordance with the provisions of GB2423.17. If the metal parts used have corresponding salt spray test reports, the test can be exempted during the validity period. 7.10 Tilt test
When testing the tilt resistance in Article 6.8.1, tilt the control box in front, back, left, right or in the most unfavorable direction of the control box, according to the tilt angle specified in Article 5.4, for 15 minutes each, and operate evenly 5 times. The product should be able to work normally. 7.11 Swing test
When testing the swing resistance in Article 6.8.2, according to 5.5. The swing angle specified in Article 5, the swing cycle is 10s. During the test, the control box should be tested in the front and back, left and right directions, each lasting 15 minutes, and evenly operated 5 times, and it should be able to work normally. 7.12 Vibration test
To test the vibration resistance of Article 6.8.3, it shall be carried out in accordance with the provisions of GB7094, and the test parameters shall be in accordance with Table 7. 7.13 High temperature test
To test the high temperature resistance of Article 6.9.1, it shall be carried out in accordance with the test method specified in GB2423.2. Within 30 minutes in the later stage of the test, it shall be evenly operated 5 times, and it should be able to work normally.
7.14 Low temperature test
The control box shall be tested in accordance with the method specified in GB2423.1. Under the condition of -25℃ for 16 hours, and within 30 minutes in the later stage of the test, it shall be evenly operated 5 times, and it should be able to work normally.
7.15 Power supply voltage and frequency change test
7.15.1 When testing the steady-state power supply voltage and frequency change performance in Article 5.7, test according to the four combined power supplies listed in Table 8, operate each for 5 times, and it should be able to work normally.
7.15.2 When testing the transient power supply voltage and frequency change performance in Article 6.9.2, test according to the two combined power supplies listed in Table 9, operate each for 5 times, and it should be able to work normally.
7.16 Anti-interference performance test
Power supply transient state change (recovery time is 3s)
When testing the anti-interference performance of electronic components specified in Article 6.9.3, it should be in accordance with Article 7.18 of GB7061. 8
Inspection rules
8.1 Factory test
8.1.1 Factory test is the inspection that must be carried out before each product leaves the factory. The certificate of conformity can only be issued after the product passes the inspection. During the inspection, if a certain item is found to be unqualified, it is allowed to be repaired and retested. 8.1.2
Factory test items
General inspection;
Electrical clearance and creepage distance detection
Dielectric strength test;
Insulation resistance measurement;
Power-on operation inspection.
8.2 Type test
Type test is to fully verify whether the product of a given type meets the requirements of this standard or product technical standards. Type test should be carried out on one JB/T5792-1991
product. It can also be carried out on two products separately without affecting the performance of the product. In any of the following cases, some or all of the type test items must be carried out: new products manufactured on trial (including old products transferred to the factory for production); a.
b, when the manufacturing process, materials or some key electrical components of the product are changed and may affect the product performance; c.
When the product is discontinued for three years and then produced again; or when serious quality problems are found in the factory test; when the relevant departments make a request.
Type test items
All factory test items:
Temperature rise test;
Enclosure protection level test;
Tilt test;
Swing test;
Vibration test;
Wet sensible heat test;
Long-term test;
Salt spray test;
Low temperature test;
High temperature test: (with electronic components);bzxz.net
Power supply voltage and frequency change test;
Anti-interference test (with electronic components).
Marking, packaging, transportation, storage
The control box should have a copper nameplate with the following information. a.
Manufacturer name or trademark;
Product model and name;
Rated working voltage and rated working current; Weight:
Factory number and manufacturing date;
Ship inspection mark.
The inner wall of the box door should have a clear and durable electrical schematic with wiring numbers marked. 9.2
The control box should be accompanied by the following documents and materials.
Product certificate of conformity;
Instruction manual;
Packing list.
9.4The packaging and transportation of the product should comply with the provisions of JB3084. 9.5The environmental conditions for product storage should not exceed the provisions of Chapter 5 for normal working conditions. 10
Spare parts
The control box shall be provided with spare parts, and the specifications and quantity to be supplied shall be specified by the manufacturer's product technical standards. 11Quality guarantee period
Within the transportation, storage, installation and use conditions required by this standard, within one and a half years from the date of shipment from the manufacturer (including one year of use period), if the product is damaged and cannot work properly due to poor manufacturing, the manufacturer shall be responsible for free repairs for the user. JB/T5792—1991
Appendix A
Select the thermal relay specifications according to the rated current of the main contactor (reference)
Select the thermal relay specifications according to the rated current of the main contactor, see Table A1 Table A1
Main contactor
Rated current
Thermal relay
Rated current
Thermal element grade
Thermal element rated current
Setting current setting range
5~6.2~7.2
7.2~9.2~11
11~13.7~16
1 6~19~22
16~19~22
22~27~32
32~39~45
45~54~63
45~54~63
63~74~85
85~103120
120~140~160
JB/T5792—1991
Appendix B
Selection of motor speed when automatic mooring winch mechanically detects tension (reference part)
Selection of motor speed when automatic mooring winch mechanically detects tension is shown in Table B1. Table B1
Note:?
When the actual tension value is balanced with the predetermined tension value (the shaded line in the table), the automatic control system does not work; when the actual tension value is less than 12% of the rated value, the motor retracts the cable at two or three speeds; 120
When the actual tension value is greater than 115% of the rated value, the motor releases the cable at two or three speeds. When it is greater than 125%, tension protection should be carried out and the motor releases the cable at three speeds.
Additional Notes:
This standard was proposed and managed by the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Shanghai Electric Science Research Institute. The main drafters of this standard are Xu Shenkang and Xu Yicheng.2 Type test
Type test is to fully verify whether the product of a given type meets the requirements of this standard or product technical standards. Type test should be carried out on one JB/T5792-1991
product. It can also be carried out on two products separately without affecting the performance of the product. In any of the following cases, some or all type test items must be carried out: new products produced on trial (including old products transferred to the factory for production); a.
b, when the manufacturing process, materials or some key electrical components of the product are changed and may affect the product performance; c.
When the product is produced again after being discontinued for three years; or when serious quality problems are found in the factory test; when the relevant departments make requirements.
Type test items
All factory test items:
Temperature rise test;
Enclosure protection grade test;
Tilt test;
Swing test;
Vibration test;
Wet sensible heat test;
Long-term test;
Salt spray test;
Low temperature test;
High temperature test: (with electronic components);
Power supply voltage and frequency change test;
Anti-interference test (with electronic components).
Marking, packaging, transportation, storage
The control box should have a copper nameplate with the following content. a.
Manufacturer name or trademark;
Product model and name;
Rated working voltage and rated working current; Weight:
Factory number and manufacturing date;
Ship inspection mark.
The inner wall of the box door should have a clear and durable electrical schematic with wiring numbers marked. 9.2
The control box should be accompanied by the following documents and materials.
Product certificate of conformity;
Instruction manual;
Packing list.
9.4The packaging and transportation of the product should comply with the provisions of JB3084. 9.5The environmental conditions for product storage should not exceed the provisions of normal working conditions in Chapter 5. 10
Spare parts
The control box should provide spare parts, and the specifications and quantities supplied shall be specified by the manufacturer's product technical standards. 11 Quality Assurance Period
Under the transportation, storage, installation and use conditions required by this standard, within one and a half years from the date of shipment from the manufacturer (including one year of use), if the product is damaged and fails to work properly due to poor manufacturing, the manufacturer will be responsible for free repairs for the user. JB/T5792—1991
Appendix A
Select the thermal relay specifications according to the rated current of the main contactor (reference)
Select the thermal relay specifications according to the rated current of the main contactor, see Table A1 Table A1
Main contactor
Rated current
Thermal relay
Rated current
Thermal element grade
Thermal element rated current
Setting current setting range
5~6.2~7.2
7.2~9.2~11
11~13.7~16
1 6~19~22
16~19~22
22~27~32
32~39~45
45~54~63
45~54~63
63~74~85
85~103120
120~140~160
JB/T5792—1991
Appendix B
Selection of motor speed when automatic mooring winch mechanically detects tension (reference part)
Selection of motor speed when automatic mooring winch mechanically detects tension is shown in Table B1. Table B1
Note:?
When the actual tension value is balanced with the predetermined tension value (the shaded line in the table), the automatic control system does not work; when the actual tension value is less than 12% of the rated value, the motor retracts the cable at two or three speeds; 120
When the actual tension value is greater than 115% of the rated value, the motor releases the cable at two or three speeds. When it is greater than 125%, tension protection should be carried out and the motor releases the cable at three speeds.
Additional Notes:
This standard was proposed and managed by the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Shanghai Electric Science Research Institute. The main drafters of this standard are Xu Shenkang and Xu Yicheng.2 Type test
Type test is to fully verify whether the product of a given type meets the requirements of this standard or product technical standards. Type test should be carried out on one JB/T5792-1991
product. It can also be carried out on two products separately without affecting the performance of the product. In any of the following cases, some or all type test items must be carried out: new products produced on trial (including old products transferred to the factory for production); a.
b, when the manufacturing process, materials or some key electrical components of the product are changed and may affect the product performance; c.
When the product is discontinued for three years and then produced again; or when serious quality problems are found in the factory test; when the relevant departments make requirements.
Type test items
All factory test items:
Temperature rise test;
Enclosure protection grade test;
Tilt test;
Swing test;
Vibration test;
Wet sensible heat test;
Long-term test;
Salt spray test;
Low temperature test;
High temperature test: (with electronic components);
Power supply voltage and frequency change test;
Anti-interference test (with electronic components).
Marking, packaging, transportation, storage
The control box should have a copper nameplate with the following content. a.
Manufacturer name or trademark;
Product model and name;
Rated working voltage and rated working current; Weight:
Factory number and manufacturing date;
Ship inspection mark.
The inner wall of the box door should have a clear and durable electrical schematic with wiring numbers marked. 9.2
The control box should be accompanied by the following documents and materials.
Product certificate of conformity;
Instruction manual;
Packing list.
9.4The packaging and transportation of the product should comply with the provisions of JB3084. 9.5The environmental conditions for product storage should not exceed the provisions of normal working conditions in Chapter 5. 10
Spare parts
The control box should provide spare parts, and the specifications and quantity supplied shall be specified by the manufacturer's product technical standards. 11 Quality Assurance Period
Under the transportation, storage, installation and use conditions required by this standard, within one and a half years from the date of shipment from the manufacturer (including one year of use), if the product is damaged and fails to work properly due to poor manufacturing, the manufacturer will be responsible for free repairs for the user. JB/T5792—1991
Appendix A
Select the thermal relay specifications according to the rated current of the main contactor (reference)
Select the thermal relay specifications according to the rated current of the main contactor, see Table A1 Table A1
Main contactor
Rated current
Thermal relay
Rated current
Thermal element grade
Thermal element rated current
Setting current setting range
5~6.2~7.2
7.2~9.2~11
11~13.7~16
1 6~19~22
16~19~22
22~27~32
32~39~45
45~54~63
45~54~63
63~74~85
85~103120
120~140~160
JB/T5792—1991
Appendix B
Selection of motor speed when automatic mooring winch mechanically detects tension (reference part)
Selection of motor speed when automatic mooring winch mechanically detects tension is shown in Table B1. Table B1
Note:?
When the actual tension value is balanced with the predetermined tension value (the shaded line in the table), the automatic control system does not work; when the actual tension value is less than 12% of the rated value, the motor retracts the cable at two or three speeds; 120
When the actual tension value is greater than 115% of the rated value, the motor releases the cable at two or three speeds. When it is greater than 125%, tension protection should be carried out and the motor releases the cable at three speeds.
Additional Notes:
This standard was proposed and managed by the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Shanghai Electric Science Research Institute. The main drafters of this standard are Xu Shenkang and Xu Yicheng.
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